Back to EveryPatent.com
United States Patent | 6,246,808 |
Mallon | June 12, 2001 |
An optical switch apparatus (110) includes a light source (112) that emits light (114) to a light emitting diode (LED) (116) which is responsive to the light (114) from the light source (112). In response to receiving light (114) from the light source (112), the LED (116) has a biased condition in which the LED (116) is effective to conduct electrical current. The LED (116) also has an unbiased condition in the absence of receiving light from the light source. The switch apparatus (110) also includes a switch (124) operatively connected with the LED (116) and responsive to the condition of the LED (116). The LED (116) effects operation of the switch (124) in a first operative state when the LED (116) is in the biased condition. The LED (116) effects operation of the switch (124) in a second operative state different from the first operative state when the LED (116) is in the unbiased condition.
Inventors: | Mallon; Charles A. (Chesterfield Township, MI) |
Assignee: | TRW Inc. (Lyndhurst, OH) |
Appl. No.: | 316853 |
Filed: | May 21, 1999 |
Current U.S. Class: | 385/16 |
Intern'l Class: | G02B 006/26 |
Field of Search: | 385/16 257/96,103 372/45 438/37,47,87,94,936 |
4032951 | Jun., 1977 | DeWinter et al. | 372/45. |
4072544 | Feb., 1978 | DeWinter et al. | 438/37. |
4417824 | Nov., 1983 | Paterson et al. | |
4878722 | Nov., 1989 | Nelson et al. | |
5721794 | Feb., 1998 | Uchiyama et al. |